Finding the Fourth Proportional to 625,429.36, 863,135.70 and 380,509.68
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Solution
The fourth proportional to 625,429.36, 863,135.70 and 380,509.68 is: 525,129.63
Step by Step Solution
- Step 1: Write the proportion equation
625,429.36 : 863,135.70 = 380,509.68 : x - Step 2: Convert to fraction form
625,429.36/863,135.70 = 380,509.68/x - Step 3: Cross multiply
625,429.36x = 863,135.70 × 380,509.68 - Step 4: Simplify right side
625,429.36x = 328,431,489,003.58 - Step 5: Solve for x
x = 328,431,489,003.58/625,429.36 - Step 6: Final answer
x = 525,129.63
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.